The SCOTT® AP50 2.2 / 4.5® is built around a low profile, one-piece backframe. The AP50 features an ergonomic fit and includes standard padding, as well as wrap around hip wings for added comfort, and a Kevlar® harness with lumbar support system. The AV-3000 facepiece has a sleek, low-profile design that provides enhanced downward and peripheral vision to improve safety and performance. The AV-3000 also features large, dual voicemitters for improved communication. The AP50 also features a redundant first stage pressure reducer system, a strap style over-center retention band permitting easy cylinder changes and parachute-style harness fasteners to facilitate donning and doffing. The AP50 accommodates 2216 and 4500 psi 30, 45 or 60 minute duration SCBA cylinders. Refurbished by SCBA Sales Co.